
Understanding the Heart's Electrical Conduction System

Interactive Video
•
Science
•
10th Grade
•
Hard
Standards-aligned
William Lovvorn
FREE Resource
9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of understanding coronary circulation in the context of EKG interpretation?
To predict future heart conditions
To understand the heart's mechanical functions
To diagnose blood supply issues
To interpret electrical activity patterns
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of the SA node in the heart?
It delays the electrical signal to the ventricles
It is the heart's primary pacemaker
It conducts signals to the left atrium
It bifurcates into the bundle branches
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the AV node's location?
It's near the left atrium for easier signal transmission
It's positioned to delay the signal to the ventricles
It's located outside the heart for protection
It's central to distribute the signal equally
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which component of the electrical conduction system is responsible for ensuring the atria contract before the ventricles?
Purkinje fibers
AV node
Bundle of His
SA node
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary function of the Purkinje fibers?
To depolarize the ventricular myocytes
To initiate the heart's contraction
To delay the electrical signal
To bifurcate into the bundle branches
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the body's backup system for pacemaking work?
By directly stimulating the ventricles
By decreasing the heart rate
By activating lower level pacemakers if the primary fails
By increasing the heart rate
Tags
NGSS.HS-LS1-3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the intrinsic rate of the SA node?
60 to 100 beats per minute
45 to 50 beats per minute
40 to 45 beats per minute
20 to 40 beats per minute
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role does calcium play in muscle contraction?
It activates the sodium-potassium pump
It stabilizes the resting potential
It helps myosin and actin to bind
It initiates the repolarization phase
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the cardiac conduction system responsible for?
being just another thing i have to learn in class
providing the spark to initiate muscle contraction
pushing blood through the circulatory system
being a way for doctors to monitor heart rate
Tags
NGSS.HS-LS1-3
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